Automotive brake



March" 9 1926.

AUTOMOTIVE BRAKE Filed Jan. .11. 1924 C. A. OHL.

/lIIlll/ll/IA igs.

INVENTOR OLYDE Aol-u.

ATTORNEY `lilqtate of Pennsylvania,`

Patented Mar. 9, 1926,

UNITED, STATES PATENT OFFICE.

CILYDE A. OHL, F WLKINSB'RG, PENNSYLVANIA, ASSIGNOR T0 .THE WESTING- HOUSE AIR' BRAKE COMPANY, OF WILMERDING,

' PENNSYLVANIA.

AUTOMOTIVE BRAKE.

To all whom z't may concern: l

Be it known that I, CLYDE A. OHL, a citizen of ,the United States, residing at iVilkinsbrg,4 in thelcounty of Allegheny and i have invented new and useful Improvements in Automotive Brakes, of which the following is a specification; r

This invention relates to brakes, and more particularly to a liuid pressure front wheel `v brake for a motor vehicle.

'llhe principal object of myinvention is to provide an improved fluid pressure controlled front wheel brake..

In the .accompanying drawing; Fig. 1 is aninner 'face View of a brake drum type of brake constructed v in accordance Withfmy invention; Fig. 2 a section on the line 2--2 indicates a portion of the 'front' axle of .a 1

Ais secured abrake drumfh of Fig. 1; and Fig. 3 a section in the planer; of the steering knuckle axis and at wright:L angle to the plane of Fig.l1. 'f f *l In the' drawing, the reterencev numeral 1f motor vehicle having thans l 2 carrying a front Wheellyj 3 Y -`internal gage-*said lvotally.' confriction Vface and*V adapted friction face arev the usualy 4neeted brake heads 5. Secured .to theknuckle 2in any Vsuitable manner is a cover lplate 6 having a" central depression to provide clearance for. the knuckle 2 and the end of the axle 1. The brake heads 5 are pivotally supl ported by the plate 6 through the pivot pin 7. To the upper portion of the plate 5, a diaphragm brake chamber is secured and said brake chamber comprises anged easing members 8 Iand 9 'having a flexible diaphragm 10 secured between the flanges of the casing members. L

A. fluid 4pressure supply and exhaust pipe 1l is connected to the chamber at one side of the diaphragm 10 and a pressureA plate l2 engages the opposite side of the diaphragm. A rod 13 is secured to said pressure plate and extends through a-central opening in the casing member 9 and also through an opening in the plate 6. i

To the outer end of the rod 13 is secured a link or cross-head 14? and -pivot'ally connected to said link are toggle levers 15. The outer ends of said levers are pivotally con'- nected tothe free ends of the brake heads-.5.

PENNSYLVANIA, A eoRronATIoN exerted when' pressure is applied to the dia- V phragm 10, the ends ot the brake heads v are tied to the rover plate (i by meansot pivotally connected links 16.

In operation, lwhen fluid under pressure is supplied through pipe 11 to the diaphragm 2, said diaphragm is forced outwardly and thereby the toggle levers 15 are operated to spread the adjacent ends of the brake heads 5, se that th'ebrake heads are forced into `frictional engagement with the friction face of thefbrake drum 4, to effect an application of the brakes. p' v The brake heads are prevented from-moving laterally lduring the operation of applying the brakes by means of the links 1G, as will be. evident.

claim-as new and desire to secure by' Let- Pat'ent, is .L In' .vehicle brake, the combination VVivith afbrake drum, brake heads mounted in saidrdrum`and a' cover plate for said drum,l of, aybrake chamber secured to said cover plate, a 'inpvable abutment in said brake chamber disposed in a vertical plane, a red operable by saidvabutment haiv'ing its axis at right angles ,'lto 'the plane of the cover plate, and a toggle lever mechanism operatively connecting 'said rod with said brake heads. l

2. In a vehicle brake, the combi-nation With a brake drum, brake heads mounted in said drum, anda vertically disposed cover plate for said drum, of a.. brake chamber .secured to said cover plate, ailexible 'diaphragm mounted in said brake chamber and disposed in a vertical plane, a horizontallyY movable rod operable by said/diaphragm, a link connected tosaid rod. and levers connecting said link to the ends of said brake, heads.

3.111 a vehicle brake. the combination with a brake drum, brake heads mounted. in said drum, and a cover plate 'tor said drum, of a brake chamber secured to said cover plate, a movable abutment in said brake chamber, a rod operable by said abutment, means operativelyl connecting said rod With the ends of said brake heads, and means for restraining said brake heads against lateral movement.

Having now described my invention, what 4. In n veh-oe biake, the eenxhilmt-on wththe'endsfSuid brake }1eads,fmnl111l s with wibl'akfe drum, "brake heads mounted Connecting the ends of s'nd brake heads to K in said drum', and a cover plate for vsaid Said cover plate to prevent lateral move- 10 drum, of e brake chamber secured to said .ment of the hnake heads.

'i @over p1ate,v'.a movable abutment n said Ill-testimony whereof I have hereunto set brake chamber, a rod opeahle by sad abntmy hand. l ment. means operatively connecting said rod CLYDE A. OHL. 

